Prevent BuildConfig builds from ever being on release builds (#1232)

diff --git a/LottieSample/build.gradle b/LottieSample/build.gradle
index c6452f4..af243f2 100644
--- a/LottieSample/build.gradle
+++ b/LottieSample/build.gradle
@@ -17,10 +17,6 @@
     multiDexEnabled true
     testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     vectorDrawables.useSupportLibrary = true
-    buildConfigField("String", "S3AccessKey", "\"" + System.getenv("LOTTIE_S3_API_KEY") + "\"")
-    buildConfigField("String", "S3SecretKey", "\"" + System.getenv("LOTTIE_S3_SECRET_KEY") + "\"")
-    buildConfigField("String", "HappoApiKey", "\"" + System.getenv("LOTTIE_HAPPO_API_KEY") + "\"")
-    buildConfigField("String", "HappoSecretKey", "\"" + System.getenv("LOTTIE_HAPPO_SECRET_KEY") + "\"")
     buildConfigField("String", "BITRISE_GIT_BRANCH", "\"" + System.getenv("BITRISE_GIT_BRANCH") + "\"")
     buildConfigField("String", "GIT_SHA", "\"" + gitSha + "\"")
     buildConfigField("String", "GIT_BRANCH", "\"" + gitBranch + "\"")
@@ -28,6 +24,10 @@
   buildTypes {
     debug {
       multiDexKeepProguard file('proguard-multidex-rules.pro')
+      buildConfigField("String", "S3AccessKey", "\"" + System.getenv("LOTTIE_S3_API_KEY") + "\"")
+      buildConfigField("String", "S3SecretKey", "\"" + System.getenv("LOTTIE_S3_SECRET_KEY") + "\"")
+      buildConfigField("String", "HappoApiKey", "\"" + System.getenv("LOTTIE_HAPPO_API_KEY") + "\"")
+      buildConfigField("String", "HappoSecretKey", "\"" + System.getenv("LOTTIE_HAPPO_SECRET_KEY") + "\"")
     }
     release {
       multiDexKeepProguard file('proguard-multidex-rules.pro')